Take-up mechanism for looms



Feb. 27, 11923.

J. NORTHROP TAKE-UP MECHANISM FOR LOOMS Filed Mar. 17, 1921 Falented inch. 2?,

v we '7. a; 5 WW 6 .r-q L (a it if Eli. u In g4 id 1MP o FACTUBING COIVIPANY, OF MILFORD, ldASSACHUSETTS,

CHUSETTSL TAKE-UP MECHANISM FOR LOOMS.

Application filed March 1'7, 1921. Serial No. 453,030.

To all whom it WMLjI/ concern:

Be it known that I, J ONAS Nonrrmor, a citizen of the United States, residing at Hopedale, in the county of Worcester and State of lvlassachusetts, have invented cer tain new and useful Improvements in T ake- Up lvflechanism for Looms; and I do hereby. declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same.

The present invention relates to an improvement in take-up mechanism for looms.

In the take-up mechanism illustrated in the co-pending application of the present inventor, Serial No. 316,5e9, filed August 11, 1919, to which reference may be had, provision was made for disengaging the worm from the change gear to permit the letting back of the cloth' manually 'to any extent desired. This was done by taking hold of the handle on the take-up pawl and disengaging it from the change gear after which the op-' erator would turn the wind-up roll by hand for thepurpose of letting back the cloth. While this was entirely practicable so far as the operation of the machine was concerned it has been found to be impractical from the weavers point of view because the gear which the operative took hold. of soiled his hand and this is highly objectionable as it entailed the later soiling of the cloth from the hand of the operative.

The object of the present invention is to produce a construction by which the windup roll may be turned back for letting back the cloth and forward again for taking it up to any desired extent with greater facility and without soiling the hands of the operative. To the above ends the present invention consists in the take-up mechanism here inafter described and particularly defined in the claims.

In the accompanying drawing, Fig. 1 is a sectional elevation of a portion of the loom showing the improved take-u p mechanism; and Fig. 2 is a front elevation of the same.

In general. the take-up mechanism com prises a wind-up mechanism, automatic letback mechanism actuated upon the absence of filling to let back the cloth, and a device for automatically limiting the amount of let-back having provision whereby different rades of cloth are let back a uniform num ber of picks without adjustment of the device to compensate for changes in the grade .of the gear train it, 15, 16, 1 7, 18 and 19.

The gear 19 is known as the change gear and is adjustably mounted in a slotted bracket 29. The change gear 19 meshes with a. worm 20 on a shaft 21 driven from the cam shaft 22 by bevel gears 11. The worm'2O is adapted to be moved out of engagement with the change gear 19 and subsequently moved into engagement therewith as'follows: the shaft 21 carrying the worm 20 is supported in a bracket 23 slidably mounted on studs 2d and 25, which in turn are extended from a second bracket 26 bolted to the loom frame. The stud 2 1 is provided with a cam 30 pivotally mounted thereon adapted to engage cam lugs 31 and 32 extended from the surface of the bracket 23 and arranged so that the movement of the cam 30 causes movement of the bracket 23 vertically upwards and then vertically downwards as the cam is oscillated back and forth. So far as the present invention is concerned the oscillations of the cam 30 are controlled and actuated by the movement of the weft hammer and detector slide 34: when the filling is absent. The means by which this is accomplished form no feature of the present invention, but reference may be had to said application for a fuller disclosure thereof. Suffice it to say for be present purposes that the cam arm 48 formed upon the cam 30 is connected by means of a link 47 with the change lever 42 secured to the rock lever 41. The change gear 19 is engaged by a holding pawl arranged so that its point engages the teeth of the change gear at all times. This pawl is pivoted on the stud, ('33 and it is provided with a handle by which it may he moved by hand to disengage it from the change gear. m heu it is desired to dis engage the worm 20 from the change gear 19 independently of actuation of the weft hammer 33. the handle 68 is pulled upon to disengage it from the teeth of the change gear and the lug 69 secured to the lower end of A GOBPOEATION OF MASSA- the pawl 60 engages the. lower end of the change lever 42 and causes the same to be swung to bl1-' 11gl1t,'tlS viewed in Fig.- 1, about the pivotpi n 57 independentlyof the rock lever 41 thus operating through the link l7 and cam arm 48 to turn the cam'Z-BO so as to lower the bracket 23 to cause the disengagement of the worm-20 from the change gear 19.. The cloth roll is now free to be let back manually and moved forward again to any 'eXtent clesired, whereupon the pawl may be dropped'into engagement with the teeth of the change gear again and the parts there- 'by-ret urne d to their"original; position. The

disengagement of the pawl from the change gear by pulling upon the' ha'ndle 68 results in the disengagement of the worm 'gear 20 from the change gear, a'ndjthereupon the cloth is free-to be let back manually to any desired extent. For this purpose a hand 0perate'dpinion 100 is provided which engages the 'g'ear 16 by the turning of which the draw roll 13 may be rotated backwardly to let back the cloth. This pinion 100 is mounted on a pinion" shaft 101 by "a bracket 102 bolted on the frame of the loom. The shaft 101 is provided on its outer end'with a hand wheel 103. It will thus be seen that by turning the handwheel with the hand the draw roll may be turned to let back the 'cloth, or may be turned in the opposite direction to take-up withoutsubjecting'the hands to the danger of in ury from contact with the gears or by being caught in the gears.

l. A take-up mechanism for looms having, in combinatioina w1ndup- HIGCllZLIllSIIl, drivmg means therefor-including a worm and gear, a holding pawl, a1si'ngle'ilever. forlireleasing the holding pa'wl and disconnecting the Wormand gear,-and a handiwheel' and pinion for actuat'ing the wind-up mechanism in either direction whenthe worm and gearare disconnected. 1 a

2 A take-up mechanlsm for looms having,

in combination; awindsup mechanism, driv- =ing-means therefor, includlng dlsconnecting "means, a holding pawl, connections between the -pawl and the disconnecting. means arranged to operate thezd1sconnecting means when thep'awl-is disengaged; and anha'nd wheel connected w1th themwlnd-up mechanism to turn it ln'either direction; i w

JONAS NORTHROP} 

